Signifying Rappers: Rap and Race in the Urban Present is a nonfiction book by Mark Costello and David Foster Wallace.

The title is based on the track "Signifying Rapper" on the album Smoke Some Kill by Schoolly D. The teasing, taunting, and insulting tradition within African American culture is referred to as "signifyin'", though the word's other meanings are perhaps reflected in Costello and Wallace's title.

Henry Louis Gates Jr. has written extensively on the Signifyin (or Signifying) Monkey, its origins and meaning, and how the monkey's attitude and effort to overcome evolved into the "Your motha is so fat" back-and-forth that was part of hip hop's original culture.

The slang of rap, like all slang, may include words that signify others, such as "cut" (turntable technique), "bite" (stealing someone else’s rhymes), "dope" (great), "dawg" (male friend) and such neologisms as "edutainment" (KRS-One) or "raptivist" (Chuck D of Public Enemy), but it is not an important use of the idea of signifying in rap or hip hop.

The work was initially published as a shorter 20-page essay in (Wallace & Costello 1990) and then expanded to book size.